船舶水下辐射噪声抑制的声振相关性方法

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (15) : 1-7.

论文

船舶水下辐射噪声抑制的声振相关性方法

李威1,杨德庆1, 2,刘西安1,刘见华3,马网扣4

作者信息 +

Acoustic-vibration correlation method for suppressing underwater radiated noise from ships

LI Wei1, YANG Deqing1,2, LIU Xi’an1, LIU Jianhua3, MA Wangkou4

Author information +

文章历史 +

摘要

船舶水下辐射噪声与船体振动的耦合关系是非常复杂的，识别水下辐射噪声与船体振动相关性较高的部位，确定影响水下辐射噪声的关键因素，对降低噪声具有重要工程意义。基于声振耦合分析原理，提出船舶水下辐射噪声抑制的声振相关性方法，探讨了船舶水下辐射噪声与结构振动特性、船上振源的频谱和船体振动响应等的相关性定量评价指标，厘清各因素对水下辐射噪声的影响规律。舱段及拖轮降噪设计示例表明，相关性定量评价指标的计算量小，根据指标值可以高效确定与水下辐射噪声相关性高的结构及影响参数，实现船舶水下辐射噪声的高效抑制设计；通过调整振源附近湿表面的板厚，舱段和拖轮的声功率总级分别降低了5.66 dB和4.84 dB，但振动减小幅度与噪声降低幅度并不是线性的。

Abstract

The coupling relationship between the hull vibration and underwater radiation noise is very complex. Identifying the parts with high correlation between underwater radiation noise and hull vibration, and determining the key factors affecting underwater radiation noise has important engineering significance for the control of ship noise. Based on the principle of acoustic-vibration coupling analysis, the vibro-acoustics correlation method was proposed for ship underwater radiation noise suppression. This method calculated the quantitative correlation evaluation indicators between the underwater radiation noise and structural vibration characteristics, the vibration source, the vibration response, and clarified the impact of various factors on underwater radiation noise. The example of the cabin section and the tugboat shows that the calculation of the quantitative evaluation indicators of the correlation is small. the index value can efficiently determine the structure and impact parameters that have high correlation with underwater radiation noise, and achieve efficient suppression of the underwater radiation noise. By adjusting the plate thickness of the wet surface near the vibration source, the sound power levels of the cabin and the tugboat were reduced by 5.66 dB and 4.84 dB, but the vibration reduction and noise reduction were not linear.

导出引用

李威1,杨德庆1, 2,刘西安1,刘见华3,马网扣4. 船舶水下辐射噪声抑制的声振相关性方法[J]. 振动与冲击, 2023, 42(15): 1-7

LI Wei1, YANG Deqing1,2, LIU Xi’an1, LIU Jianhua3, MA Wangkou4. Acoustic-vibration correlation method for suppressing underwater radiated noise from ships[J]. Journal of Vibration and Shock, 2023, 42(15): 1-7

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